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INSTALLATION GUIDE & OPERATION MANUAL
ASPEN R410a WALL MOUNT AIR HANDLERS
AFW/ABW SERIES – VERTICAL WALL MOUNT
AIR HANDLER - COPPER COIL (HYDRONIC HEAT)
CONTENT
1.
Important Safety Instructions
2.
Introduction & General Information
3.
Inspection
4.
Installation Instructions and Clearances
5.
Installation
6.
Connecting Refrigerant Lines
7.
Metering Devices / Liquid Line Connection
8.
Leak Check / Standing Pressure Test / Vacuum Test
9.
Electrical Line Voltage Wiring
10.
Low Voltage Connections
11.
Air Volume Adjustment
12.
System Charging
13.
Hydronic Heat
14.
Final System Checkout
15.
Wiring Diagrams
1.
IMPORTANT SAFETY INSTRUCTION
Potential safety hazards are alerted using the following symbols.
The symbol is used in conjunction with terms that indicate the
intensity of the hazard. It is the responsibility of the owner and the
installer to read and comply with the safety information and the
instructions accompanying these symbols.
Read the precautions in this manual carefully
before operating the unit.
Read the instructions in this manual carefully
before operating the unit.
Read the instructions in this manual carefully
before servicing the unit.
Read the instructions in this manual carefully
before wiring the unit.
Warning or Caution
This symbol indicates a potentially hazardous situation,
which if not avoided, could result in serious injury, property
damage, product damage or death.
This symbol indicates a potentially hazardous situation,
which if not avoided, may result in moderate injury or
property damage.
Certified technicians or those individuals meeting the
requirements specified by NATE may use this information.
Property and product damage or personal injury hazard may
occur without such background.
This appliance is not intended for use by persons (including
children) with reduced physical, sensory, or mental
capabilities, or lack of experience and knowledge, unless
they have been given supervision or instruction concerning
use of the appliance by a person responsible for their
safety. Children must be supervised to ensure that they do
not play with the appliance.
Product designed and manufactured to permit installation
in accordance with local and national building codes. It is
the installer's responsibility to ensure that the product is
installed in strict compliance with the aforementioned
codes. Manufacturer assumes no responsibility for damage
(personal, product or property) caused due to installations
violating regulations.
Disconnect ALL power before servicing or installing this
unit. Multiple power sources may be present. Failure to do
so may cause property damage, personal injury, or death.
This unit is not approved for outdoor installations.
1
WARNING
CAUTION
WARNING
WARNING
WARNING
IO-A1-009 | rev1
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Summary of Contents for Aspen AFW Series
- Page 1 The symbol is used in conjunction with terms that indicate the INSTALLATION GUIDE & OPERATION MANUAL intensity of the hazard. It is the responsibility of the owner and the ASPEN R410a WALL MOUNT AIR HANDLERS installer to read and comply with the safety information and the instructions accompanying these symbols.
-
Page 2: Hazardous Voltage
The unit is designed for operation with 120 V, single phase, • 60 Hz power supply. Aspen will not be responsible for This appliance shall be installed in accordance with national damages caused due to modification of the unit to operate wiring regulations. - Page 3 maintain constant torque. Motors are pre-programmed at the factory. ABW models: are equipped with a PSC motor. • Cabinet: Sturdy, short, galvanized steel cabinet with painted front panels. Cabinet fully insulated with 1/2” faced insulation to prevent sweating and mold growth, to encapsulate glass fibers, and to provide excellent R-value.
- Page 4 As Pamphlet No. 90A or 90B. They should be sized in accordance expressed in our product warranty; ASPEN WILL NOT BE BILLED with National Environmental System Contractors Association FOR ANY STRUCTURAL DAMAGES CAUSE BY FAILURE TO Manual K, or whichever is applicable.
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Page 5: Installation
If holding pressure is not present, return coil to distributor for exchange. CAUTION Some Aspen coils may include a Schrader valve on the suction manifold. Ensure that the Schrader valve and valve core (where present) are protected from heat during brazing and installation to prevent leakage. -
Page 6: Connecting Refrigerant Lines
5.1.4. Secure the bracket vacuum tested prior to refrigerant charging, according to the with screws sufficient following requirements: to hold 4X the weight of the air handler. The minimum test pressure for the low side of the system shall be the low side design pressure and the minimum test pressure for Fig 5.3 the high side of the system shall be the high side design pressure,... - Page 7 METERING DEVICES / LIQUID LINE CONNECTION 6.3. Use a tubing cutter to cut the suction line connection at the Aspen coils are available with two kinds of metering devices a) air handler. Clean the burr from the cut tubing to reduce the flowrater / fixed orifice, or b) TXV.
- Page 8 O-ring Fig 7.6 Fig 7.3 During some installations, a piston change may be required. If so, the installer MUST change the piston. Use piston sizes I-2. Replace the Teflon O-ring (located between the halves). recommended by the outdoor unit manufacturer. If a sizing chart Discard Schrader if present.
- Page 9 the body. Make sure the piston moves freely in body. Fig 7.10 CAUTION Pay close attention to the piston orientation. The pointed end of the piston MUST go into the distributor body, towards the coil. Failure to ensure this orientation will cause the piston to be bypassed during operation which might damage the Fig 7.11 –...
- Page 10 and correct superheat control, the TXV sensing bulb must conform to ALL of the following criteria: III-1. Disassemble the The sensing bulb MUST be in direct and continuous flowrater body using two contact with the suction line. wrenches. Unscrew the The sensing bulb should be mounted horizontally on the body with...
- Page 11 III-10. Tighten all connections taking care to use proper back up. Tighten the nut to a torque of approximately 10-30 ft-lbs. III-11. Remove the valve identification sticker from the valve and place it adjacent to the Aspen model number on unit name plate. Fig 8.1 If any leaks are discovered, remove nitrogen pressure and III-12a.
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Page 12: Low Voltage Connections
WARNING The air handler comes factory setup for a single stage cooling system. The hydronic heat are preinstalled, and will also have a A fused disconnect switch must be field provided for the low voltage wire for field connection (Fig 10.1). unit to be in compliance with UL 60335-2-40 Clause 7.12.2. - Page 13 Fig 10.4 Boiler (Field Install): For field install boiler, connect two wires on the “BOILER” terminals marked as T T (Fig 10.4a). See wiring Fig 10.2 diagram Fig 15 for proper connections. Operating CFM based upon each speed tap number is shown on In an application where a valve or pump is used to regulate the hot the electrical wiring diagram of the unit.
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Page 14: Air Volume Adjustment
The AFW Series uses a constant torque ECM Motor. This motor will try to maintain proper motor torque to achieve programmed air volume levels at varying levels of external static pressure. The air volume level produced by the air handlers at varying external static pressure levels is shown in Table 11.2a. -
Page 15: System Charging
13. HYDRONIC HEAT 5. If outdoor unit instructions and charts are not available, use Aspen provided charts. Make certain indoor air temperature is 13.1 Hydronic Coil Connection near comfort level setpoint 75F, prior to establishing superheat and subcooling levels. - Page 16 Aspen will not be responsible for any property or personnel damage caused by failure to follow this instruction. WARNING Hot water flowing to the coil should be in the range of 120º - 180º F. Water at these temperatures can cause first-degree burns.
- Page 17 not being circulated through the coil but the pump is 13.5.1 Equipment Sizing: Select an air handler with a heating running, then open the air bleed valve in the unit and output that exceeds the space heating loss of the structure and purge any air left in the system.
- Page 18 heater. An expansion tank may be necessary to correct this problem. Please contact a qualified plumbing professional for assistance. • Hot water is circulating through the water coil during cooling cycle: The check valve may be stuck open and allowing hot water to circulate through the coil.
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